LTA spends $4m to tackle CTE water leaks for third time
The Straits Times Friday, 5 September 2003

The LTA is now spending $4 million to lick the persistent problem of leaks that have discoloured and damaged wall surfaces, and left black gunk at the walls" base.
This is the third time in 12 years that the Government is tackling the problem, first spotted about a month after the tunnels opened in 1991.
Previous attempts, costing several millions, failed.
The authorities have insisted that leaks are common in tunnels and are not dangerous, although some experts reckon water might compromise the integrity of the steel beams in the concrete over time.